39898409773 has 2 divisors, whose sum is σ = 39898409774. Its totient is φ = 39898409772.

The previous prime is 39898409723. The next prime is 39898409783. The reversal of 39898409773 is 37790489893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39649969129 + 248440644 = 199123^2 + 15762^2 .

It is a cyclic number.

It is not a de Polignac number, because 39898409773 - 2⁹ = 39898409261 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39898409699 and 39898409708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39898409723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19949204886 + 19949204887.

It is an arithmetic number, because the mean of its divisors is an integer number (19949204887).

Almost surely, 2^39898409773 is an apocalyptic number.

It is an amenable number.

39898409773 is a deficient number, since it is larger than the sum of its proper divisors (1).

39898409773 is an equidigital number, since it uses as much as digits as its factorization.

39898409773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82301184, while the sum is 67.

The spelling of 39898409773 in words is "thirty-nine billion, eight hundred ninety-eight million, four hundred nine thousand, seven hundred seventy-three".